The most easiest way to defeat majin vegeta is given below: When the field play begins against Majin Vegeta, you just stand on the spot you were on when you began the field play and Majin Vegeta will come after you but your ally will come and fight Majin Vegeta. Your ally will lose but he will take a lot of health from vegeta. When your ally loses quickly attack vegeta and starts the battle. His health will be really low and it will be easy for you to beat him!